Multiple punching-machine.



E. M. COBB.

MULTIPLE PUNCH ING MACHINE. APPUCATlON mm FEB. 5, m5.

L b i fififiu Patented Oct. 16,1917.

,3 SHEETS-SHEET 1- 1 57i? izessas 1520612301,

E. M. COBB.

MULTHPLE PUNCHING MACHINE.

APFLICATiON rmzu FEB. a. 1915.

LA8 656 Patented 0m. 15, 1917.

3 SHEETS-SHEET 2.

E. M. COBB.

MULTIPLE PUNCHiNG MACHINE.

APPLICATION FILED FEB. 5 1915- v Patented Oct. 16, 1917.

3 SHEETSSHEET 3- fwweizim'r flwm/Y,

entrain srars Parana opinion.

ELMER M. COBB, OF SOUTH PORTLAND, MAINE, ASSIGNOB T SOUTHWORTH MACHINECOMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

MULTIPLE PUNCHI-NG-MAOHINE.

Application filed February 5,1915.

To all 1072 0121. it may concern Be it known that I, Emma M. COBB, acitizen of the United States, and resident of South Portland, county ofCumberland, State of Maine, have invented an Improvement in MultiplePuncliing-ldachines, of which the following description, in connectionwith the accompanying drawings is a specification, like characters onthe drawings representing like parts in each of the sev eral views.

This invention relates to punching machines and particularly to a typeof machine well adapted for manual operation, and adapted to operateeither one or a selective plurality of variably spaced punchessimultaneously and by the same operating mechanism. One important objectof the invention is to provide a machine wherein punch heads bearing anydesired type of punch may be quickly and easily adjusted and clamped inoperative position in the machine, the organization being such as topermit a selective plurality of punch heads to be adjusted incooperative relation in the machine, and spaced variably apart accordingto the requirements of the work in hand. A further object is to providean organization adapted to hold the punches rigidly and strongly incooperative relation to the work, and with an operating mechanismadapted to impart a powerful stroke that is evenly applied to theseveral punches, where several are used, with a relatively smallapplication of power. A. further object is to provide an operatingmechanism adapted to impart a powerful stroke evenly applied to theseveral punches with a rigid unyielding pressure impulse on each punchfrom the source of power application. The foregoing and other objectsand features of the invention will be better understood from thefollowing detailed description taken in connection with the accompanyingdrawings and will be thereafter pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a perspective view showing a preferred embodiment ofmyimproved machine;

Fig. 2 thereof;

is a transverse vertical section Specification of Letters Patent.

Patented Get. 16, 1917.

Serial No. 6,281.

Fig. 5 is a fragmentary perspective showing the work gage in detail;

Fig. (3 is an elevation showing the detachable operating handle;

Fig. 7 is a fragmentary perspective of the end of said handle detached;and

Fig. 8 is a sectional detail showing the giems" for clamping a punchhead to the A suitable bed or base support 10 which may have perforatedears 11 for securing it in place, has forwardly projecting brackets 12supporting a work table 13 secured thereto by screws 13.the rear edge ofwhich maybe suitably graduated as indicated at 14. Just back of thistable the bed is formed with an undercut ledge 15 extending through mostof the length thereof. and near its back with a parallel ledge 16, theseledges constituting cooperating portions of a slide way on which thepunch heads are adjustable, one of these heads being indicated at 17 andtypifying any desired number within the capacity of the machine. Thebase between the ledges 15. 16 is formed with hearing portions 18 ofsubstantial extent on which the punch heads are supported. these beingstiffened by clownwardly extending vertical ribs 19 with an intermediatespace 20 through which the punchings may fall into a receivingreceptacle 21. Each punch head is formed with a base portion 22 of blockform adapted to rest on the bearing portions 18 and equipped with a too23 adapted to engage with the undercut ledge 15. At the rear of thisbase portion an upright portion 24: integral therewith has a forwardextension 25 spaced from the base 22 and provided with a verticalpassage 26 through which is slidably fitted the punch 27. The uprightportion 24 of the punch head at its rear is recessed vertically from itsbottom to near its top as seen at 28, this recess being of some littlewidth all. the way up but considerably enlarged near the top to form ayielding neck 29 with a thicker slab portion 30 depending therefrom.This recess :28.

. vided with depending portion 30 is formed at its bottom with a bearingface 31 adapted to engage with the ledge 16. The punch head soconstituted is formed to slide easily along its islide ways so astobring it to any desired position for operation; for clamping it in aselective adjusted position a screw bolt 32 is threaded throughdepending portion 30 and equipped with a kerf head 33 whereby it may beengaged to turn it up so that its forward end will impinge on the faceof the main upright portion 2% at the side of the As the screw 32 isturned up after this impingement the extension 30 will be s'irungoutward causing the face 31 to bear against the ledge 16 and thisreacting against the ledge at the forward portion of the head will clampthe head securely in place with a capability of being instantly releasedfor other adjustments by turning back said screw The screw 32 is formedwith a stop flange 3; back of the screw threads thereon, this, being forthe purpose of engaging the extensionv to prevent the screw-from beingturned in far enough to spring out said extension to a point that mightcause breakage of the neck Means is provided to serve as a gage for thematerial to be punched as it is inserted between the base portion andthe overhanging portion 25 of the punch head and for this purpose agage, member 3st is fitted to slide in the space between these parts.This member may be formed as best seen in Fig. 5 of a U-shaped stampingwith a recess 35 at one side thereof to receive a reduced neck at theend of an adjusting screw rod 36 which is threaded through the back ofthe punch head and extends through an enlarged passage 37 therefor inthe depending spring portion 30. This screw rod may be proany suitablemeans shown as knurled head 38 whereby it may be readily turned foradjustment.

For coact-ion with the punch 27 the base portion 22 may be provided witha hardened die plateQQO having a hole 221 theret rough of a size topermit the punchings to be i forced therethrough by the punch 27. The

punch or punches 27 are shown equipped with an enlarged head 39 with ahub s'. spaced therefrom and presenting an outer conical face n. Foroperatii'ely engaging the punch or punches a le er arm 42 is journaledat 4:3 to uprights 4-stextending from the rear portion of the base 10.The width of the arm d2 extends substantially the full distance betweenthe uprights Hand along the 'entire extent of its forward edge it isformed with a presser face if) adapted to engage the tops of thepunches, and with hook portion i6 formed to engage the reduced neckportion between the end 39 and the hub 40. The cross section of thispunch engaging forward edge of the arm42 is uni- ,ese

form throughout its extent and hence the punch remains in operativeengagement therewith as the head 1? adjusted the bed. The arm i2 ispreferably or a curved, substantially seiniecyhndrlcai form 'in crosssection with the fulcrum 43st one side thereof, and the punch engagingface approximately diametrically opposite.

Intermediate these sides and housed Wltiilll the concavity of the arm soas to, be protectedv and concealed thereby in use is the operatingmechanism for swinging said arm to impart punching increments. 'ihe arm.42 is also formed at its ends with inwardly extending shroud flangeswhich serve the three-fold function of stiffening said arm, ofaft'ordingmeans for applying imwer thereto,-and of further housing and .inciosingthe operatingmechanism. i'Ab"Qi Qll; e 35 of the arm 42 ands'ubstantial1.. A eccent --these eccentrics being held rigid Wlili tae shaft as bymeans of suitable keys 53 and ournaled to turn in bearings in saiduprights. Means may be provided whereby the throw of the shaft 51 ineach direction may be positively limited so that it may not pass theuppermost and lowermost limits of throw as effected by the eccentrics52. F or this purpose 1 may provid a yoke stop member 5% fixed to shatU51 and with projections 55 spaced apart so to engage an extension of'pin48 at the proper poi t. The shaft 51 has keyed or otherwise d thereto atone end an operating arm 56 w 2b a handle 57 at the end thereof. Thehandle .57 is preferably removably fitted to the arm 56 having for thispurpose a reduced extension 58 equipped with screw threads 59 adapted tofit into a socket in the end of said arm equipped with operatiyeserewthreads 50. The end. of this detachable handle 57 is recessed as seen 23061 and provided with a transverse blade 62. T he nun pose of this isto permit said handle tb be readily removed and used as a screw driverfor engaging the kerf end 33 of the screw as seen at S when said screwis to be operated, the recess 61 and blade 62 being of suitabledimension for this purpose. gage piece 63 is fitted to slide along thetable 13 and for this purpose it is held? with a screw and nutadjustment 6st at the end of an arm 65 slidably fitted to a rod'66 heldA in by arms 67 projecting forwardly from the uprights 44: and rigidtherewith.

' adjustment of this gage with reference to the scale 14: the work maybe accurately positioned with reference to the punch, it beingunderstood that the punch head will be likewise adjusted along its wayswith reference to said scale which may conveniently he graduated eachway from a central zero point as shown. This gage device therefore inconjunction with the adjustable back gage 3st permits the holes to bepunched accu- "ately in any part ofthe material desired.

This provision, for ready and accurate adjustment of the punch head orheads and the material relative to each other i consider to be onedistinguishing ciaracteristic of the invention. A further importantcharacteristic is the construction of the punch operating arm a2 whichin its arcuate form as set forth presents a rigid unyielding presserface that is absolutely even along the entire extent thereof,while theform of said arm as noted serves as a housing and container for theoperating mechanism. it is to be noted that the operating meanscomprising the shaft 51 with its eccentric sleeve is adapted to impart apowerful punching pressure with a minimum of power applica tion, whichpunching pressure gradually and evenly increases to a maximum by reasonof the particular setting of the eccentric as shown as the punchingoperation is being completed. I also consider the construction of thepunch heads 17 with the described pre- YlSlOll for clamping adjustmentthereof to be a valuable and important feature of invention, and the useof this is not to be understood as limited to cotiperation with theother specific features set forth. I therefore desire the presentembodiment to be considered in all respects as illustrative and notrestrictive, reference being had to the appended claims rather than tothe foregoing description to indicate the scope of the invention.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

l. Punching apparatus, comprising a bed, a punch operating lever armfulcrumed thereto, said arm presenting a punch engaging face ofsubstantial width extending along the length of said bed, and a punchliead with a punch fitted therein adjustably fitted to said bed to beengaged by said face at adjustable selective points therealong tooperate on work at different points along the length of said bed and atvariably spaced distances apart.

Punching apparatus, comprising a bed, a relatively wide punch operatingarm fulcrumed thereto, said arm having at one end thereof a punchengaging face of substantial extent along the length of said bed, and apunch head adjustably fitted to ways of Thus by said bed having a punchslidably fitted therein adapted to be engaged by said punch engagingface throughout the range of adjustment of said punch head along the bedto operate on work at different points along the length of said bed andat variably spaced distances apart.

3. Punching apparatus. comprising a bed, a punch operating arm curved incross section, fulcrumed at one end to said bed and formed *ith a punchengaging face at its other end, operating mechanism housed within thehollow of said arm and operatively engaged therewith, and a punchmounted to be engaged by said punch engaging face of said arm.

ft. Punching apparatus, comprising a bed, a. relatively wide punchoperating arm curved to approximately a semi-circle in cross section,fulcruined at one end to said bed and formed with a punch engaging faceof substantial extent at its other end, operating mechanism housedwithin the hollow of said arm and operatively engaged there 'ith, and apunch mounted to be engaged by said punch engaging face of said arm. andadjustable on said. bed.

Punching apparatus, comprising a bed, a relatively wide punch operatingarm fulcrumed at one end to said bed and formed with a punch engagingface of substantial extent at its other end, said arm being curred incross section with stiffening flanges at its sides, operating mechanismmused within the hollow of said arm and engaged therewith, and a punchhead slidably fitted to ways of said bed underneath said arm and bearinga punch to be engaged by said arm throughout the range of adjustment ofsaid head.

6. Punching apparatus, comprising a bed, a relatively wide punchoperating arm fulcrumed thereto at one end and having a punch engagingface of substantial extent at its other end, said arm being ofsubstantial curvature in cross section and presenting its concave sidetoward said bed, operating mechanism housed within the hollow of saidarm and connected thereto, and a punch head carrying a punch to beengaged by said arm, said punch head being slidably fitted to ways ofsaid bed and being covered by said arm throughout its range of adjustment.

7. Punching apparatus, comprising a bed, a punch operating arm fulcrumedthereto and presenting a punch engaging face, operating mechanismconsisting in a manually operable shaft having eccentrics fixed at itsend portions, said eccentrics being journaled in bearings of said bed,link connections from said shaft to said arm, and a punch mounted onsaid bed to be engaged by said arm.

8. Punching apparatus, comprising a bed,

a punch operating arm fulcrumed thereto and presenting a punch engaging:tace, 0pcrating mechanism consisting 111 a manually operable shatthaving eccentrics fixed at its end portions, said eccentrics beingjournaled in bearings of said bed, link connections from said shaft tosaid arm, means for li1niting the movement of said shaft in each disaidway.

10. Punching apparatus, comprising a bed equipped with punchoperatingmechanism and a punch head having a punch slidahly tittedthereto to be engaged by said mechanism, said bed being formed with aslide way for said punch head with ledges at opposite sides thereof, andsaid punch head having a portion slitted with respect to the bodythereof for spring action with a screw bolt mounted to press said slitportion outward whereby said punch head is clamped to said ledges inselective adjusted positions.

11 Punching apparatus, comprising a bed, a relatively wide punchoperating arm fulcrumed thereto towardthe rear thereofwith a punchengaging face at its front end, a punch head bearing a punch slidablyfitted to said bed underneath said arm to be operatively engaged therebyvat difierent points, a table mounted at the front portion or" said bedwith a scale along the rear edge thereof, and a gage adjustahlymountedto be moved over said table, said gage and said punch head beingcooperatively adjustable to determine the punching material.

12.?unching apparatus, comprising a bed, a punch head slidably fitted toways thereof, said punch head consisting'ina block having a portionformed to spring for engaging said ways, and a clamping screw screwhaving a stop flange arranged to prefor causing said portion to spring,said vent excessive springing of said portion, a

position on the punch slidably fitted in saidpunch head,

and means for operatino' the same.

in testimony whereof, l have signed my name to this specification, 11the presence of two subscribing witnesses.

ELMER M. COBB. Witnesses GEORGE E. Wnnrrs, Cnrrroen VVILsoN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, 1

Washington, D. (3.

